Traditional Tharu worship various gods in the form of animals such as dogs, crow, ox and cows. Such gods are seen in Hinduism. Every village has their own deity, commonly known as Bhuinyar. Tharu in East Nepal call their deity Gor-raja.
Most Tharu households own a statue of a traditional god. Family members often offer animal's blood sacrifices to appease the god. Animals such as pigeons and chickens are used for sacrificial purposes. Milk and silk cloth are also used. Many Tharu would also use the blood of one of the male members in the family for such rituals. Such rituals are conducted through ceremonies, and superficial cuts are made forehead, arms, throat, legs, and/or chest.

The gods are believed to have the ability to heal diseases and sickness. According to traditional legend, gods are given a bhakal, a promise of something, on condition that the sickness is cured, in any events of misfortunes, plagues and horror dreams. A relative's death is an event of great significance among Tharu, and rituals conducted varies in accordance to regions.

Tharu would approach shamans as doctors, known as Guruba. Such shamans use Buddhist medicines to cure illness. Shamans will also try to appease gods through incantations, beating drums and offering sacrifices. The Tharu believe sickness comes when the gods are displeased, and the demons are at work.